SELECT [Count Of Register], COUNT(1) [Grouped Count]
FROM
(
SELECT COUNT( [Id]) as [Count Of Register],
Tag as [Tag]
FROM [Members]
Group By Tag
) MyTable
GROUP BY [Count Of Register]
SELECT [Count Of Register], COUNT(1) [Grouped Count]
FROM
(
SELECT COUNT( [Id]) as [Count Of Register],
Tag as [Tag]
FROM [Members]
Group By Tag
) MyTable
GROUP BY [Count Of Register]